What issue can result from shutting down a diesel engine immediately after full-load operation?

Shutting down a diesel engine immediately after it has been operating at full load can lead to turbo seizure. This occurs due to the high temperatures generated during full-load operation. When the engine is turned off abruptly, the turbocharger, which relies on the engine's exhaust gases to maintain its rotation, can experience a sudden loss of lubrication. The hot oil remaining in the bearings can also break down, leading to the formation of carbon deposits and potentially causing the turbocharger to seize. This can have serious implications for engine performance and longevity, ultimately leading to costly repairs.

The other options relate to different issues that may arise under various circumstances but aren't the immediate consequences of a sudden engine shutdown after full load. For example, oil leakage occurs over time due to wear or poor seals, overheating is typically a result of cooling system failure or insufficient lubrication during operation, and fuel contamination usually arises from poor fuel quality or improper handling rather than the act of stopping an engine suddenly.